Curling tongs



July 12, 1932. ca. BRODBECK 5:11" AL. L fl CURLING TONGS Filed April 19, 1929 5 Sheets-Sheef. l

y 1932- G. BRODBECK ET AL 1,866,747

CURLING TONGS Filed April 19, 1929 3 Sheets-Sheet 2 July '12, 1932.

G. BRODBECK ET AL dURLING TONGS Filed April 19, 1929 3 Sheets-Sheet 5 Fig. 2

H 5. figs. Fig. 40. Ag. 44.

Patented July 12, 1932 UNITED STATES PATENT OFFICE GUSTAVBRODBECK, OF LEONBERG, AND ALFRED REI-IM, OF STU'ITGARI, GERMANY, ASSIGNORS TO ROBERT BOSCH .AKTIENGESELLSCHAFT. OF STUTTG-ART, GERMANY CURLING TONGS Application filed April 19, 1929, Serial No. 356,506, and in Germany November 22, 1928.

The present invention relates to curling tongs and more particularly to hollow curling tongs which may be electrically heated.

It is desirable in electric curling tongs or iron that the halves of the tongs to be heated internally should be composed of as few members as possible.

A metal tube, suitably bent for the handle, has already been proposed for the heating arm in the form of a rod. This construction is however disadvantageous since the metal tube must be cut at the point of articulation in order to allow of insertion of the current leads to the heating resistance. In addition =these cut-away portions weaken the metal tube at exactly the point where it is particularly highly stressed by the oint.

In order to overcome this disadvantage and at the same time to obtain a simple method of manufacturing curling tongs, each tong element comprising an arm and a handle consists according to this invention of a single sheet of metal which is welded after drawing, rolling, bending and stamping.

One form of construction of the invention is shown by way of example in the accompanying drawings in which 2- Figure 1 is a side view of the finished curling tongs.

Figure 2 is a section through a channelled heating arm along the line AB of Figure 5.

Figures 35 show a channelled tong element from three different sides.

Figure 6 shows a blank for a channelled tong element.

Figure 7 is a section through a round or rod-shaped heating arm along the line CD of Figure 10.

Figures 81O show a round tong element from three different sides Figure 11 shows a blank for a round tong element.

Figure 12 is a section along the line EF in Figure 4.

The curling tongs as shown in the drawings are formed of elements 1 and 2. The element 1 has a heating arm in the form of a rod and the element 2 a channelled heating arm. The two elements are made of longitudinal blanks 3 or 4 which are stamped out symmetrically of their longitudinal centre line. The stampings 3 and 4 are provided at the centre with two lateral lugs 5 through which a pivotal connection passes in the finished tongs, and terminate at the top end in three points 6 or 7. The stamping 4 is provided centrally with a cut-away portion 8 which in the finished tongs provides an opening for the passage of the other element of the tongs. The two stampings 3 and 4 are drawn, rolled, bent and stamped in suitable manner until the two halves have the shape shown in the drawings and are then welded along a line 9. A pressed out curved channel 10 is provided on either side of the pivotal axis in the element 2 through which the leads to the two resistances 11, shown in dotted lines, are passed. The heating elements are introduced from the centre of the halves of the tongs into the heating arms before assembling the tongs. The heating tongs canof course befitted in any suitable manner. Instead of being welded together the contacting parts of the halves of the tongs may be soldered or connected together in any other suitable manner.

As in the form of construction shown the usual closure member at the point of the heating arm is omitted, the heating resistance can also effectively heat the point of the arm.

Instead of the small recess at the upper end of the stamping 3 the points of the latter can also be simply rounded olf. Only one welded seam is then produced at the top of the heating arm. The other end of the stamping 4 can be similarly constructed so that the three lugs 6 are omitted and only one rounded point is provided.

What we claim is:

1. Electrical curling tongs consisting of a pair of tong elements each comprising a handle and an arm formed from a single metallic blank bent to form a container for an electric heating unit and having a single longitudinal seam.

2. An electric curling tong element comprising a tubular arm portion for receiving a heater unit and a handle portion both formed from a single longitudinally symmetrical blank having lateral lugs extending symmetrically from the sides thereof substantially at its midlength.

3. An electric curling tong element comprising a tubular arm portion for receiving a heater unit and a handle portion both formed from a single longitudinally symmetrical blank having lateral lugs of arcuate contour extending symmetrically from the sides thereof substantially at its midlength.

4. An electric curling tong element comprising a tubular arm portion for receiving a heater unit and a handle formed from a single longitudinally symmetrical blank having substantially V-shaped lugs extending from one end thereof.

5. An electric curling tong element comprising a tubular arm portion for receiving a heater unit and a handle formed from a single longitudinally symmetrical blank having substantially V-shaped notch-es formed in one end thereof.

6. An electric curling tong element comprising a handle and a tubular arm portion for receiving an electric heating unit, said handle and arm portion being formed from a single metallic blank having grooves pressed out in the material thereof substantially at its midlength. I

7. An electric curling tong element comprising a handle and a tubular arm portion for receiving an electric heating unit, said handle and arm portion being formedfrom a single longitudinally symmetricalnletallio blank bent to form a container and having pressed out grooves in the material thereof substantially at its midlength.

8. Electrical curling tongs consisting of one tong element which comprises a handle and an arm of circular cross section and a sec ond tong element which comprises a handle and an arm of channel cross-section each of said elements being formed of a single longitudinally symmetrical metallic blank which is symmetrically bent about a longitudinal plane and seamed along a line in said plane to form a container, and an electric heater unit in the container portion of each tong element.

9. An electric curling tong element comprising a handle and a hollow arm for receiving a heating unit, said element being formed from a single longitudinally symmetrical metallic blank tapered at one end and having lateral lugs extending symmetrically from the sides thereof substantially at its mid-length and symmetrically disposed notches formed in said tapered end.

10. An electric curling tong element comprising a handle and a hollow arm forming a container for an electric heating unit, said element being formed from a single metallic blank.

11. Electrical curling tongs consisting of second tong element which comprises a handle and an arm of channel cross-section each of said elements being formed of a single longitudinally symmetrical metallic blank which is symmetrically bent about a longitudinal plane and seamed along a line in said plane to form a container, an electric heater in each container portion, one of said tong elements having grooves pressed out in the material thereof substantially at its midlength, and electric circuit connections to said electric heaters arranged in said grooves.

In testimony whereof we have hereunto afli'xed our signatures.

GUSTAV BRODBECK.

ALFRED REHM.

one tong element which comprises a handle 7 and an arm of circular cross section and a 

